Durasight Dead-On 1 Piece 1" Scope Mount and Rings System Medium Height for CVA Rifles and Muzzleloaders Fits all CVA break action centerfire and muzzleloading rifles with the serial # ending in -10 or greater (with the exception of CVA Apex) - Fits 1" scope tubes. - Matte black finish. - 50% stronger than aluminum. - Guaranteed for life from the manufacturer. - Weaver compatible.